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I have a Guitar Research Amplifier Integrated Solo

I have a Guitar Research Amplifier Integrated Solo Tube Series T64RS: Channel 1 (which I assume is the clean channel) will cut in and out and the light will dimmer with it and it makes a fuzzy poof sound each time it kinda goes out. Also it will distort on that channel too. Please help. I do not want to be lied to by a repairs place. I don't have a lot of $. Thank you for any help.

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As far as I can tell from this; you could have either one of two problems.
1. Your guitars output or amps input could be loose. This happened to me with my bass. All you have to do to fix that is get into the electronics (usually accesed behind plates with screws), find where the cord goes and pinch the two clips together to make the fit tighter
2. There could be a problem with your power; which could possibly originate from the socket itself, a loose attachement of the power cable to the amp, or a loose cable inside the amp. Id reccomend plugging some other electronics into the wall and seeing if their power dims, if they dont then plug in and unplug the part of the cord that attaches to your amp and if that doesnt work you'll need to take i in to an expert to look at the internals of it.

Posted on Jul 29, 2013

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  • Chris Fernandez Jul 30, 2013

    Both solutions make sense to me (I am not that smart) IF I had problems with Channel 2 too. But I don't. Can you explain that. B4 i open this amp I need to understand a little more. And the power seems fine but I will try another outlet, if i understand why that would only affect Channel 1, not 2. Thank you

  • nicholas pollett Jul 30, 2013 The two things in the bottom right of this pictre are what your patch cord plugs in to. Try pushing the long metal part in a little bit because thats what hold your cord in the right place to ge the signal through without cutting

  • Chris Fernandez Jul 30, 2013

    Thank u that helps alot, but still if the input is not functioning wouldn't it affect the distortion channel too?

  • nicholas pollett Jul 30, 2013

    Ya it would. I was assuming the way you where wording it that there were 2 seperate inputs and one wasnt working; but if its one input then theres probaby a loose cord somewhere inside and it would be a good idea to take it to a proffesiona;



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Posted on Jan 02, 2017

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SOURCE: Channel one doesn't work

The 12AT7 is usually the driver tube for the tubes before it ( the input channels ). It can also be the driver for the reverb or tremelo channel. I'm not sure what model of amp you have or the manufacturer but there are plenty of places to look on the internet for info. is a good place to start. If you can't find the schematic for your amp try and find one that is similar to give you some ideas. If you don't have the basic tools like a volt/ohm meter and a capacitance tester. You might have to consider a pro to look at it. You will be looking for resistors and capacitors in the same circuit as the tubes that you originally mixed up. If its a hybrid solid state/ tube amp you will also need a transistor tester. Of course good soldering abilities are necessary and ABSOLUTELY do not work on the amp while it is plugged in and make sure you properly discharge the filter capacitors in a safe and proper manner before touching the circuit. All the info you need to sucessfully do it yourself is available at the library or on the net as long as you are confident in your abilities and first and foremost work in an absolutely informed and safe manner. Hope this helps.

Posted on Jul 16, 2009

  • 1 Answer

SOURCE: my amp has 2 channels, clean and distortion.

I have same problem where distortion works but clean doesn't on same amp. What might be helpful for someone to help me is that sometimes the clean does work.

Posted on Feb 09, 2010

  • 5603 Answers

SOURCE: Hey, the clean channel on my Marshall 250dfx Combo

The switching is done electronically by an analog gate chip. On IC9, check if the signal on pin 8 changes with switching between clean and OD... This is the actual signal that changes the gate. If you don't see a change there of say 5 volts, then the problem is in the circuits that drive this gate. If the signal is there, then the problem is in the clean channel audio op amps or the components around them. Let me know the results of the test.

Posted on Oct 22, 2010

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